Do you have boxes of stuff and not sure whether it's considered a "collection" or just clutter?
I came across a short video that might help you figure it out.
http://www.boomeralley.com/2009/04/14/collection-or-clutter/
If after watching this short clip, you determine it's clutter, just get rid of it. If you are still not sure, perhaps you want to consult with a professional to find out, or, like the video mentions, go on E-bay and see how much your stuff is really worth.
Remember, in most cases, it's just "stuff" which translates into "clutter". The memories they evoke are still there (in your head, not in that box). You don't need to keep all that stuff to keep the memories alive.
Before you let go of your precious collection of clutter, simply take a picture and preserve the memory.
Then, just let it go.
If you are feeling ovewhelmed with the prospect of getting organized, simply contact A BETTER SPACE. I will be more than happy to help.
Enjoy your week!